#define _CRT_SECURE_NO_WARNINGS

#include<stdio.h>

typedef unsigned int uint;
//typedef 可以重新定义

typedef struct Node
{
    int data;
    struct Node* next;
}Node;
//typedef 可以重新定义

int mian()
{
    unsigned int num1 = 20;
    uint num2 = 30;
    struct Node n;
    Node n2;
    return 0;
}